@ALL
It was clearly noted by Geohot in
www.blackra1n.com;
"If your ipt2/3GS/ipt3 is rebooting into recovery after running blackra1n, this isn't a bug. It's a feature. You need to run blackra1n every time to boot it. This 'feature', called tethered jailbreak, is enabled by upgrades Apple made to the bootrom and the fact ipt3 uses nand flash."
... anyway we'll just wait for the great Geohot to release untethered jailbreak...
BR